In Ubuntu 22.04 I had a nice setup where I could stream an external audio/video stream mixed with audio and video from my webcam to Discord.
Since Ubuntu 22.10 the audio part causes echo for the others although I always use a headset to prevent echoes from the audio in the room (from speaker to microphone).
For the video: grabbed from HDMI (with a small USB dongle), mixed that with OBS with my webcam, output it with a virtual camera from OBS; that virtual camera I used in Discord to stream the video content as my camera image.
For the audio I had setup soundux to mix my microphone audio with the audio from OBS just for Discord and listen to the audio coming in from Discord and from OBS (the HDMI dongle) - so I don't hear my own voice and the others don't hear their audios echoed.
Problem with Discord is that in Linux it doesn't support the audio if you stream a window.
I know that Ubuntu switched the sound system from pulseaudio to pipewire (pulseaudio still available somehow as a compatibility layer?) in this update from 22.04 to 22.10.
Any idea how I could get back my streaming setup without the echoes? I'm new to pipewire, no experience with that.
The last thing I tried was a modified Discord-client called discord-screenaudio, but it also has a little bit of echo and more annoyingly it crashes every ~30 minutes or even brings the whole graphics to a freeze for ~2 minutes from time to time. (No extra high CPU load, and audio still working.)
